Dynamic Price Updater

[lat9]

I do get the ZC Admin login page but after the submit button I get a 500 error page.

500 error implies a PHP log present in the site's /logs sub-directory. Since you can't log in, view that sub-directory either using an FTP program (e.g. WinSCP or FileZilla) or via your webhost's cPanel's File Manager tool.

Remember that since the log was issued from the admin, its contents will include reference to your admin directory's name. Be sure and xxx those occurrences out and post a pertinent log within a "CODE" tag (the big # in the menu bar shown when you're writing your response).